Filter.



Ho. 68!,339. Patanted' NM. 6,1900.

A. R. GREVER.

FILTER.

(Application filed. my 17, 1900.) (Ila model.) 2 Shoots-Shae! l.

INVENTOH A-TTOHNEY m2 News pzrzns on. Pucruumoq WAiNINF-YON. u. c

No. ssww. Patented Nov. 6, I900. A. a. ensvzn.

FILTER.

{Application filed May 17, 1900.) (Io Mqdel.) 2 Shaetk-Shgsat 2.

W/TNESSES //v VENTOH w l e1 fg TTOHNE Y ALBERT R. GREVER, OFPHILADELPHIA, PENNSYLVANIA.

FILTER.

SPECIFICATION forming part of Letters Patent No. 661.339, dated November6, 1900.

Application filed May 17, 1900. Serial No. 16,982. kNo model.)

To (tZZ whom it may concern/.-

Be it known that LALBERT R. GREVER, a citizen of the United States,residing in the city and county of Philadelphia and State ofPennsylvania,have invented certain new and useful Improvements inFilters, of which the following is a full, clear, and exact description,reference being had to the accompanying drawings, forming a part of thisspecification.

This invention relates to filters, my object herein being to provide anapparatus of simple and eflicient construction wherein a uniformdistribution and pressure of the liquid in and throughout thefiltering-bed shall be effected and wherein the cleansing of thefiltering substance from impurities deposited therein may beexpeditiously accomplished.

The invention, briefly described, comprises a casing in which thefiltering material is contained, means in said casing for receiving anddistributing the inflowing liquid,and cer-' tain inlet and outletpassages under the control of suitable valves which may be set to permitthe percolation of the liquid down through the filtering material and topermit the discharge of the liquid thus clarified, or which valves maybe set to permit a reverse iiow of water through the filtering materialfor the purpose of cleansing such material and carrying off theimpurities deposited therein.

The invention also comprises various novel features of construction andorganizations of parts, which will be hereinafter particularly describedand claimed.

In the drawings, Figure 1 is a side elevation of the apparatus, partlyin section. Fig. 2 is a longitudinal section of the body of theapparatus. Fig. 3 is a horizontal section, enlarged, as on the line 00of Fig. 2. Fig. dis a similar section as on the line y y of Fig. 2. Fig.5 is a plan of the central stand-pipe detached. Fig. 6 is asectionalelevation of the supply-pipe and adjuncts.

1 is a cylindrical casing in which the filtering material 2 iscontained. This casingin its preferred construction comprises twoflanged sect-ions 3 a, bolted or otherwise secured together, and twooutwardly-expanded heads 5, likewise secured to the outer ends of thesections. Suitable gaskets 6, such as bass wood, are interposed betweenthe contiguous flanges to insure absolutely tight joints. The body ofthe casing is divided into two compartments 7 8 by diaphragms 9 of wovenwire or other reticulated material, which are supported upon circulargrates 10, suitably arranged within the casing. In the present instancethe peripheral edges of the grates are V-shaped in cross-section andfitted to corresponding grooves 11, formed in andaround the innerabutting edges of the cylinder-sections and end heads in such mannerthat when the sections and heads are bolted together the several grateswill be securely clamped there by. The filtering material is containedin the compartments thus formed. Extending centrally through thecylinder is a stand-pipe 12, the lower end of which terminates inaseries of radiating branch pipes 13 contained within an opening intothe space or chamber 14, formed by the bottom end head. The upper end ofthis pipe extends through the top of the cylinder and communicates withthe over lying portion of'a supply-pipe 15, which is connected at oneend with a source of water-supply, while the other end leads to asuitable point of discharge. This supplypipe is also connected at twopoints with the space or. chamber 16, formed by the upper end head, theconnections in this instance comprising short tubes or nipples 17 18,disposed one on each side of the vertical pipe. Two three-Way valves 1920 are appropriately set within the supply-pipe in respect to theconnections, and provision is had whereby the valves may besimultaneously turned more or less to open and close the connections inprescribed order, whereby the liquid from the source of supply may bedirected through the connection 17 into the filteringbeds, percolatingtherethrough into thcchamber 14, thence returning through the verticalpipe to the overlying pipe, and passing thence through the valve 20 tothe point of discharge. Thus the valves are set preparatory to thefiltration of the liquid; but if it be desired to cleanse the interiorof the filter from the impurities therein the valves are so set thatwater will be delivered directly from the supply-pipe to the verticalpipe, flowing therethrough to the chamber 14 and rising therefromthrough the filtering-bed, and thence passing by way of the connection18 to the discharging portion of the overlying pipe and carrying off theimpurities deposited in the filtering-bed.

The type of three-way valve which I prefer to employ is clearly shown inFig. 6, the two valves being therein represented in the relativepositions they occu pydurin g the process of filtration. The stems 21 ofthe respective valves are provided with exteriorlyarranged arms 22,Whichare united by a link 23, one of the arms being extended to constitute ahandle, by the manipulation of which the valves may be concertedlyoperated. Arranged within the chamber 16 is a distributing membercomprising a horizontally-disposed plate 24, provided, preferably, onits upper face with a series of channels 25 of different lengths. Theliquid upon entering the chamber impinges against this plate and isevenly spread thereby throughout the chamber, thus insuring an equaldistribution and pressure of the liquid on the filtering material andobviating all liability of the channeling which would otherwise occur.Fitted within the overlying supply-pipe in advance of the valve 19 is acheck-valve 26, the gate of which is disposed to permit the fiow of theliquid to the filter, yet prevent its return past the valve.

The general operation of the apparatus may be briefly described asfollows: Assuming the valves to be set in the relative positionsindicated in Fig. 6, the water or other liquid to be treated is directedfrom a suitable source of supply to the pipe 15, thereupon in its courseopening the checkvalve and passing by way of the valve 19 and connection17 to the filtering-beds. As the liquid flows into the upper portion ofthe filter it strikes upon the opposing plate and is distributed therebyupon and throughout the upper portion of the filtering material,percolating therethrough to the chamber at the bottom of the filter. Theliquid thus filtered enters the branches at the foot of the stand-pipe,rises'in the latter to the overlying pipe, and passes through the openvalve- 20 to a suitable point of discharge.

If it be desired to cleanse the interior of the filter, the valves 19and 20 are moved a q uarter-turn to the right, so as to close thecommunication between the connection 17 and the supply-pipe and toeffect communication between the connection 18 and the discharging endof said pipe. Water is then directed to the supply-pipe, the same in itscourse opening the check-valve. This water flows to and down the centralstand-pipe and is discharged into the bottom chamber of the easing, andthence rising through the filteringbeds and passing through theconnection 18 and valve 20 to the discharging end of the overlying pipe,thus carrying off the impurities which may have lodged in the interiorof the filter during the preceding filtering opera tions.

I claim- 1. The combination with the casing provided withrelatively-arranged inlet and outlet openings, the filtering material insaid casing, and ahorizontally-disposed plate interposed between theinlet-opening and the filtering material, the upper surface of saidplate being provided with channels of different lengths, substantiallyas described.

2. The combination with the casing, and the filtering material therein,of the supplypipe, at stand-pipe leading from the supplypipe and openingbelow the filtering material and connected at its upper end with thesupply pipe, inlet and outlet connections between the supply-pipe andthe upper part of the casing, said connections being located on therespective sides of the union of the standpipe with the supply-pipe andvalve mechanism for controlling the said connections, substantially asdescribed.

3. The combination with the casing and the filtering material therein,of the supply pipe, a stand-pipe leading from the supplypipe to a pointbelow the filtering material, a series of laterally-extending openbranch pipes on the lower end of the stand-pipe, inlet and outletconnections between the supply-pipe and the upper part of the casing,said connections being located on the respective sides of the union ofthe stand-pipe with the supply-pipe and valve mechanism for controllingthe said connections, substantially as described.

4. The combination with the casing, and the filtering material therein,of the supplypipe, a stand-pipe leading from the supplypipe and openingbelow the filtering material and connected at its upper end with thesupply pipe, inlet and outlet connections between the supply-pipe andthe upper part of the casing, said connections being located on therespective sides of the union of the standpipe with the supply-pipe,three-way valves in said connections, and means for simultaneouslysetting said valves, substantially as described.

In testimony whereof I have hereunto affixed my signature in thepresence of two subscribing witnesses.

ALBERT R. GREVER.

Witnesses:

ANDREW V. GROUPE, J OHN R. NOLAN.

